Projects per year
Abstract
We demonstrate, via scanning tunneling microscopy (STM) measurements performed at 48 K, the existence of "bright beaches" at the edges of K islands (diameter similar to 5-500 nm) on the graphite surface. The enhanced tunneling current is only observed in monolayer-high islands on graphite, and not in islands of similar geometry on top of a K monolayer film. First-principles density functional calculations and STM simulations suggest that this is an STM field effect, which appears as the positive tip attracts donated electrons back to the metallic K islands. The restored charge accumulates preferentially at the island edges.
Original language | English |
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Pages (from-to) | 106102 |
Number of pages | 1 |
Journal | Physical Review Letters |
Volume | 102 |
Issue number | 10 |
DOIs | |
Publication status | Published - 1 Mar 2009 |
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Dive into the research topics of 'Bright Beaches of Nanoscale Potassium Islands on Graphite in STM Imaging'. Together they form a unique fingerprint.Projects
- 2 Finished
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Materials Program Platform Grant : Nanostructured Surfaces
Palmer, R., Guo, Q., Li, Z., Kaplan, A. & Robinson, A.
Engineering & Physical Science Research Council
1/07/07 → 31/12/11
Project: Research Councils
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Atomic Manipulation at Room Temperature
Palmer, R.
Engineering & Physical Science Research Council
1/12/06 → 30/11/09
Project: Research Councils